Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1995-09-27
1997-11-11
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
25022711, G01J 510
Patent
active
056867271
ABSTRACT:
An ultraviolet radiation detection exposure system determines either ultraviolet flux or accumulated ultraviolet energy. A detector converts the ultraviolet radiation into voltage, and a voltage-to-frequency converter provides a corresponding frequency. If the system measures flux, a conversion subsystem converts the frequency to an associated ultraviolet flux in watts. If the sensor measures ultraviolet energy over a period of time, a counter counts at the frequency of the voltage-to-frequency converter thereby integrating the received ultraviolet energy at the detector. A reset button allows the user to reset the system, clearing the counter, prior to entering the sun for the day. A warning light, display, or buzzer indicates to the user of the system that her skin is in danger of receiving a sun burn. A plurality of fibers and/or lambertian half-spheres are used to provide substantially uniform solar acceptance. A solar cell can be used to power the apparatus, especially within a watch configuration.
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Hoyt S. Scott, "Measurements of Erythemal Energy." AIEE Technical Paper 49-186 (Jul. 1949) title page and pp. 1-9. number known!.
Belletete Thomas
Reenstra Arthur
Reenstra Wende
Vock Curtis A.
Hannaher Constantine
SeeUV
Vock Curtis A.
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